- remove the old LGPL license headers from all files in Spack - add SPDX headers to all files - core and most packages are (Apache-2.0 OR MIT) - a very small number of remaining packages are LGPL-2.1-only
* Update dmd. * Build dmd and druntime. * Build dmd. * Restore edit. * Flake8.
* dmd: a new package. * Install src for dmd. * Install src to prefix.src. * Replace copy_tree with install_tree.